WSK1216
www.vishay.com
Vishay Dale
Power Metal Strip® Resistors, Low Value,
High Power, Surface-Mount, 4-Terminal
FEATURES
• 4-terminal design allows for 1 % tolerance
down to 0.0002 Ω
• High power-to-footprint print size ratio
• All welded Power Metal Strip® construction is
ideal for all types of current sensing, voltage
division and pulse applications
• Proprietary processing technique produces
extremely low resistance values, down to
0.0002 Ω
• Sulfur resistance by construction that is
unaffected by high sulfur environments
• Solid metal manganese-copper and manganese-coppertin alloy resistive element with low TCR (< 20 ppm/°C)
• Very low inductance 0.5 nH to 5 nH
• Low thermal EMF (< 3 μV/°C)
• Maximum solder temperature up to 350 °C for 30 s
• AEC-Q200 qualified (1)
• PATENT(S): www.vishay.com/patents
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
LINKS TO ADDITIONAL RESOURCES
3D 3D
3D Models
Design Tools
Infographics
Notes
• Follow link to Overview of Automotive Grade Products for more details: www.vishay.com/doc?49924
(1) Flame retardance test may not be applicable to some resistor technologies
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE
WSK1216
1216
POWER RATING
P70 °C
W
3.0
5.0
8.0
8.0
THERMAL
RESISTANCE
°C/W
14.5
7.3
3.6
3
RESISTANCE VALUE
RANGE (1)
Ω
1m
0.5m
0.3m
0.2m
TOLERANCE
±%
1.0
1.0
1.0
1.0
WEIGHT
(typical)
g/1000 pieces
60
60
60
60
Notes
• The full power rating of Power Metal Strip resistors are dependent upon the ability of the circuit board to dissipate the heat energy created
in the resistance element. It is recommended to follow common design practices for power semiconductors that ensure the junction
temperature is maintained with in thermal limits by using large pad surfaces, thermal vias, heavier copper weights, internal layers as well as
other thermal spreading features. The thermal resistance values provided function in the same manner as junction to terminal temperature
(1) Other values may be available, contact factory
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: WSK12161L000FEA (WSK1216, 0.001 Ω, ± 1 %)
(visit www.vishay.net Vishay Dale parts numbering manual for all options)
W
S
K
1
2
1
6
1
L
0
0
0
F
E
A
GLOBAL MODEL
(7 digits)
RESISTANCE VALUE
(5 digits)
TOLERANCE CODE
(1 digit)
PACKAGING CODE (1)
(2 digits)
SPECIAL (2)
(2 digits)
WSK1216
L = mΩ
1L000 = 0.0010 Ω
L5000 = 0.0005 Ω
F = ± 1.0 %
EA = lead (Pb)-free, tape / reel
(dash number)
(up to 2 digits)
From 1 to 99 as
applicable
Notes
(1) Packaging code: EB (lead (Pb)-free) is a non-standard packaging code designating 1000 piece reels. The non-standard packaging code is
identical to our standard EA (lead (Pb)-free), except that it has a package quantity of 1000 pieces
(2) Follow link for customization capabilities: www.vishay.com/doc?48163
PATENT(S): www.vishay.com/patents
This Vishay product is protected by one or more United States and international patents.
Revision: 10-Dec-2021
Document Number: 30189
1
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSK1216
www.vishay.com
Vishay Dale
TECHNICAL SPECIFICATIONS
PARAMETER
Component temperature coefficient
(including terminal) (1)
Element TCR
(3)
Operating temperature range
Maximum working voltage
(4)
UNIT
WSK RESISTOR CHARACTERISTICS
ppm/°C
< 35 ppm, 0.2 mΩ and 0.3 mΩ
< 50 ppm, 1 mΩ
< 150 ppm, 0.5 mΩ
ppm/°C
< 20
°C
-65 to +170
V
(P x R)1/2
Notes
(1) Component TCR - total TCR that includes the TCR effects of the resistor element and the copper terminal; over temperature of +20 °C
to +60 °C
(2) Element TCR - only applies to the alloy used for the resistor element
(3) Maximum working voltage - the WSL is not voltage sensitive, but is limited by power / energy dissipation and is also not ESD sensitive
DIMENSIONS in inches (millimeters)
CONSTRUCTION OUTLINE
W
L
R
N
2
H
S
U
3
1
Resistive element:
refer to table below
for element material
2
Terminal: solid copper
3
Terminal / element weld
c
w
a
b
1
d
DIMENSIONS in inches (millimeters)
MODEL
WSK1216
MODEL
WSK1216
W
L
H
R
(REF.)
S
U
N
0.122 - 0.014
(3.1 - 0.35)
0.150 ± 0.012
(3.81 ± 0.3)
0.075 - 0.014
(1.9 - 0.35)
0.106
(2.70)
0.020 ± 0.004
(0.5 ± 0.1)
0.031 + 0.012
(0.8 + 0.3)
0.024 ± 0.006
(0.6 ± 0.15)
SOLDER PAD DIMENSIONS
MODEL
a
b
c
d
w
0.116
(2.95)
0.024
(0.61)
0.020
(0.50)
0.028
(0.70)
0.142
(3.60)
WSK1216
RESISTANCE VALUE
(mΩ)
ELEMENT MATERIAL
0.2
MnCuSn
0.3
MnCuSn
0.5
MnCuSn
1.0
MnCu
Notes
• 3D models available: www.vishay.com/doc?30334
• Surface mount solder profile recommendations: www.vishay.com/doc?31052
Revision: 10-Dec-2021
Document Number: 30189
2
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSK1216
www.vishay.com
Vishay Dale
DERATING - AMBIENT TEMPERATURE
DERATING - TERMINAL TEMPERATURE
Axis Title
Axis Title
10000
120
10000
120
Stability < 1.0 %
100
1st line
2nd line
60
60
Stability < 0.5 %
100
40
100
40
1000
80
1st line
2nd line
1000
80
2nd line
P/PNorm. (%)
2nd line
Rated Power (%)
100
20
20
0
25
50 70
10
0
10
0
-65 -50 -25
0
100 125 150170
20
40
60
80 100 120 140 160 180
TK - Terminal Temperature (°C)
Ambient Temperature (°C)
PULSE CAPABILITY
click to get started
VE
TI
A
R
ST
U
ILL
S
SE
O
RP
PU
LY
ON
www.vishay.com/resistors/power-metal-strip-calculator
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal shock
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
± 0.5 %
Short time overload
Refer to link for short time overload performance and pulse capability;
www.vishay.com/resistors/power-metal-strip-calculator/
± 0.5 %
Low temperature operation
-65 °C for 24 h
± 0.5 %
High temperature exposure
2000 h at +170 °C
± 0.5 %
Bias humidity
+85 °C, 85 % RH, 10 % bias, 1000 h
± 0.5 %
Mechanical shock
100 g’s for 6 ms, 5 pulses
± 0.5 %
Vibration
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
± 0.5 %
Load life
2000 h at +70 °C, 1.5 h “ON”, 0.5 h “OFF”
± 1.0 %
Resistance to solder heat
3 x at 250 °C ± 5 °C for 30 s ± 5 s
± 0.5 %
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7b not required
± 0.5 %
PACKAGING
(1)
MODEL
WSK1216
REEL
TAPE WIDTH
DIAMETER
PIECES/REEL
CODE
12 mm / embossed plastic
330 mm / 13"
2000
EA
Notes
• Embossed carrier tape per EIA-481
(1) Additional packaging details at www.vishay.com/doc?20051
Revision: 10-Dec-2021
Document Number: 30189
3
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
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Revision: 01-Jan-2022
1
Document Number: 91000